Electrode mount



' March 2l, 1939. DEsoRMEAUx ELECTRODE MOUNT Filed Sept. 17, 1936 Z22 Ue/zzw' esor//zeazzz Patented Mar. 21, 1939 UNITED STATES PATENT GFFICE 14 Claims.

This invention relates to arc lamps and more particularly to improvements in electrode mounts therefor, although certain features thereof may be employed with equal advantage for other purposes. f t

It'contemplates more especially the provision of improved auxiliary electrode mounts that enable the more effective and substantially complete use of electrodes which have hitherto been discarded,

It is proposed, therefore, to provide extensions for electrode mounts that may be utilized in conjunction with electrodes that already have been used and are too short for direct support in the primary mounts. This also entails the use of an additional auxiliary support that is detachably associated with the regular lateral support so as to be readily available for use in conjunction with the mount extensions, thereby affording a substantially complete use and burning of the electrodes until the body thereof is practically exhausted. This results in an appreciable savings of electrodes and provides for economy and greater efficiency.

One object of the present invention is to simplify the construction and improve the operation of devices of the character mentioned.

Another object is to provide an improved auxiliary electrode support that is usable in conjunction with an electrode extension to increase the longevity of use and operation of electrodes for arc lamps.

Still another object is to provide an attachment for an arc lamp electrode support to enable the use of electrode extensions.

A further object is to provide a lateral support for electrodes that is instantly available for use in conjunction with an electrode extension.

A still further object is to provide electrode extensions for an arc lamp in conjunction with improved lateral supports therefor to avail the burning of electrodes beyond their minimum length for which the lamp is designed.

Still a further object is to provide an attachment serving as a lateral electrode extension mount to avail the continued use of electrodes beyond their normal minimum length.

Other objects and advantages will appear from the following description of an illustrative embodiment of the present invention.

In the drawing:

Figure 1 is a fragmentary sectional View in elevation taken through a commercial arc lamp of known construction with electrode extensions and lateral supports thereof embodying features of the present invention.

Figure 2 is a sectional view taken substantially along line II-II of Figure 1.

Figure 3 is a perspective view of a lateral electrode support of the type shown in Figure 2 with the threaded screw removed therefrom to clarify the showing.

Figure 4 is a perspective view of an electrode extension adapted to be placed in the mount to receive an electrode that is shorter than its normal minimum length for continued use.

Figure 5 is a sectional View in elevation of a modified lateral support for electrodes embodying features of the present invention,

Figure 6 is a sectional view in elevation of a still further modified embodiment of a lateral support for electrodes embodying features of the present invention.

The structure selected for illustration comprises a casing I of any desired shape, contour, and size for confining the instrumentalities of a commercial arc lamp embodying a pair of primary electrode mounts II and I2 supported by standards I3 and I4. The standards I3 and I4 are supported by the casing I0 and confront each other to support the instrumentalities to be hereinafter described. The standard I3 extends downwardly to the bottom of the casing I0 and terminates upwardly in a stationary jaw I which confronts a movable arcuate jaw I6 to directly receive a carbon electrode I'I therebetween or an extensible mount I8 thereof. A threaded rod I9 extends through a bracket integrally or otherwise attached to the standard I3 and the threaded extremity of the rod I3 operatively engages the movable jaw I6 to enable the adjustment thereof for engagement or releasable disengagement of the electrode II or its extension I8 that has a shank of the same diameter.

As shown, the shank I8 of the electrode ex` tension is of the same diameter as the electrode Il, but it terminates in an enlarged cylindrical head 2l provided with an end bore 22 having a diameter somewhat greater than the diameter of the electrode I'I for the reception thereof. A set screw 23 extends laterally through the cylindrical head 2l of the electrode extension I8 to engage the electrode I'I disposed in the bore 22 so as to effect the support thereof in axial alignment with the shank I3 of the electrode extension. The threaded rod I9 that adjusts the jaw I6 has a winged or other type of head that is accessible within the casing Ill fo-r convenient adjustment and manual manipulation.

CII

In order to support the positive carbon I1 laterally of its primary mount II, a rod 24 extends from the standard I3 near to the bottom of the casing I0 to carry an upwardly extending bracket 25 having a plate 26 attached thereto so that its arcuate extremity 21 extends in the path of the carbon I1 for reception thereon and to effect the support thereof near the free extremity 28 of the carbon electrode I1. Any appropriatel feeding mechanism (not shown) of known construction may be used to feed the positive electrode I1 with or without its extension I8. It should be noted that the electrode extension I8 increases the electrical resistance in the circuit to compensate for the lowered electrical resistance of an abnormally short carbon electrode I1 to restore its initial arcing efficiency.

The mount I2 for the moveable electrode has a tubular horizontal bore 29 extending completely therethrough in registry with a somewhat larger opening 30 provided in the plate or standard I3. A feeding mechanism (not shown) is operatively connected to a pair of electrode engaging jaws 3I and 32 pivoted as at 33 for slidable movement within the bore 29 while grasping the shank of the carbon electrode 34 or the shank 35 of corresponding diameter comprising partof the extensible electrode mount 36. It is to be noted that the mount extension 36 has a tubular bore 31 provided axially therein to receive the carbon electrode 34 and secure such therein by means of a stud 38 extending laterally through the cylindrical portion 36 to engage the electrode 34.

In order to effect the grasping engagement or releasable disengagement of the extensible shank 35 or the carbon electrode 34 depending upon which is grasped between the jaws 3I and 32. The jaw 32 is provided with a rigid extension 39 beyond the pivot 33 to pivotally receive a lever 40. The lever 40 is operatively connected to an eccentric 4I disposed in the path of the extension 42 comprising a part of the jaw 3I. In consequence thereof, the jaws 3| and 32 are caused to approach or separate responsive to the pivotal manipulation and positioning of the lever 40 which operates the eccentric 4I against the Jaw extension 42.

So that the moveable electrode 34 may be supported laterally of its primary mount I2 through the medium of the displaceable jaws 3I--32 thereon, an elongated supporting member 43 having a depending bracket extension 44, is reslliently mounted for support by the standard I4 so that its upwardly offset extremity 45 will engage the electrode 34 near the arcing tip thereof and effect its support in axial alignment with the stationary electrode I1. To this end, a pair of fastening studs 46 and 41 project freely through the bracket plate 44 to threadedly engage the standard I4. Flanges 48 are formed on the Shanks of the studs 46 and 41 to limit the movement of the bracket member 43 owing to coil springs 49 which are between the standard I4 and the bracket plate 44, thereby normally urging the rockably mounted carbon support 43 in a counter-clockwise direction (viewed from Figure 1) to properly support the carbon electrode 34 without its extension 36.

In order to reflect the light generated between the arcing electrodes I1 and` 34, a concave refiector 50 is attached to the standard I4, it being provided with an axial opening 5I to receive the moveable electrode 34, the moveable electrode extension 36, and the bracket support 43 therethrough. The arc between the electrodes I1 and 34 is generated at the focal point of the reflector 50 so as to reflect light through a lens provided in the casing IU (not shown) to direct and concentrate the light rays therethrough. In order to provide for the axial support of the extension 36 in the moveable jaws 3I-32 of the primary mount I2, and thus enable the use of the already used electrodes 34 that are below the minimum normal length for direct mounting in the jaws 3I-32, an auxiliary bracket 52 is detachably or otherwise associated with the auxiliary support 43 for cooperation with the enlarged portion of the electrode extension 36.

To this end, the bracket 52 is preferably provided with a depending flange 53 having an 1nwardly offset portion 54 defining a groove 55 for receiving the edge of the auxiliary supporting member 43 therein. Another flange 56 is formed on the opposite edge of the bracket 52 to confront the flange 53 and provide for the threaded engagement of the stud 51 laterally therethrough so that its extremity 58 will frictionally engage the adjacent edge of the auxiliary supporting member 43, thereby holding the bracket 52 in any adjustable position along the auxiliary support member 43. An upstanding plate 59 is integrally or otherwise associated with the bracket 52, and its upward edge 60 is arcuate in configuration to receive the correspondingly contoured cylindrical periphery of the electrode extension 36 and effect the support thereof in horizontal axial alignment with the stationary electrode I1 and its extension I8.

It will be apparent, therefore, that the bracket 52 may be readily attached and detached and rendered available for immediate use whenever the electrode 34 becomes too short and requires the extension 35 to be utilized in conjunction therewith in much the same way as the stationary extension I8 is utilized to support the electrode I1. The electrode extensions I8 and 35 are preferably used only when the electrodes I1 and 34 burn down with use until they become too short for direct mounting in the confronting primary electrode mounts I2 for maintaining the proper arc therebetween. Other forms of electrode extension supporting brackets may be utilized and in Figure 5 there is shown a modlfied embodiment of the structure shown in Figure 2.'

In this embodiment, the auxiliary supporting member 43 has a lug 6I attached to the bottom surface thereof by means of any suitable fasteners 62 extending in operative engagement therewith from the top of the auxiliary supporting member 43. The depending lug 6I has a link 63 pivotally connected thereto as at 64, it terminating in an offset arm 65 which is pivoted as at 66 to an ear 61 integrally or otherwise formed, in conjunction with a bracket plate 68. The bracket plate 68 has an upstanding plate 69 formed with an arcuate extremity 1U serving as a complement of the cylindrical portion 36 of the moveable electrode extension 35.

In c-onsequence thereof, the auxiliary supporting plate 69 may be displaced below the auxiliary supporting member 43' whenever the moveable electrode 34 is suiciently long for direct attachment to the jaws 3I-32. Whenever the extension 35 is necessary, the auxiliary bracket 68 is pivoted to assume the position and support above the auxiliary supporting member 43' (Figure 5) to engage the enlarged extension 36 and thus support the electrode 34 beyond and laterally of its position of attachment in the extension 36 or the jaws 3I32.

A still further modified embodiment of the auxiliary bracket support for the member 43" (Figure 6) consists in an upstanding plate 69 having an arcuate upward edge 10 to serve as described in conjunction with the embodiment shown in Figures 2 and 5. In this instance, however, the plate 69 has one or more depending studs 'H which serves as complements of correspondingly sized and shaped apertures 12 provided in the auxiliary supporting member 43". This enables the auxiliary supporting plate 69 to be readily positioned and detachably associated with the auxiliary electrode supporting member 43" so that it may be used or dispensed with depending upon the length of the electrodes 34.

Various changes may be made in the embodiment of the invention herein specifically described Without departing from or sacrificing any o1' the advantages of the invention or any features thereof, and nothing herein shall be construed as limitations upon the invention, its concept or structural embodiment as to the whole or any part thereof except as defined in the appended claims.

I claim:

1. In an arc lamp, the combination with confronting mounts for sustaining carbon-electrodes, or means for supporting said electrodes in horizontal alignment, electrode extension mounts associated with said last named means, and an auxiliary rest detachably associated with said extension mount to sustain electrodes of reduced length.

2. In an arc lamp, the combination with confronting mounts for sustaining carbo-n electrodes, of means spaced from said mounts for supporting said electrodes in horizontal alignment, electrode extension mount supporting means detachably associated with said last named means, and an auxiliary electrode rest adjustably connected to said mount for displacement into operative and inoperative positions relative to the electrode.

3. In an arc lamp, the combination with confronting mounts for sustaining carbon electrodes, of means spaced from said mounts for supporting said electrodes in horizontal alignment, detachable electrode extension mount supporting means adjustably associated with said last named means, and an auxiliary rest provided on said last named means and spaced from said first named mounts to sustain electrodes of reduced length.

4. In a device of the character described, the combination with an extension for a carbon electrode, of an auxiliary support for said electrode extension, said auxiliary support comprising a body having means to enable the attachment thereof to a frame, and a lug on said body serving as an auxiliary rest to receive said electrode extension thereon.

5. In a device of the character described, the

- combination with an extension for a carbon electrode, of an auxiliary support for said electrode extension, said auxiliary support comprising a body, means adjustably connected to said body to enable the attachment thereof to a frame, and a lug adjustably associated with said body to receive said electrode thereon.

6. In a device of, the character described, the combination with an extension for acarbon electrode, of an auxiliary rest for said electrode extension, said auxiliary rest comprising a body,

means pivotally connectedvto said body to enable the attachment thereof to a frame, and a lug on said body to receive said electrode thereon.

7. In a device of the character described, the combination with a stationary electrode mount, of a movable electrode mount confronting said stationary mount, electrode engaging means in the path of said movable mount to support a horizontally extending electrode in conjunction with said movable mount, an electrode extension for said movable mount, and an auxiliary rest for said electrode extension detachably associated with said electrode engaging means to assist in the support of said electrode extension.

8. In a device of the character described, the combination with a stationary electrode mount, of a movable electrode mount confronting said stationary mount, electrode engaging means in the path of said movable mount to support a horizontally extending electrode in conjunction with said movable mount, an electrode extension for said movable mount, and an auxiliary adjustable rest for said electrode extension detachably associated with said electrode engaging means to assist in the horizontal support of said electrode extension.

9. In an arc lamp, the combination with an electrode mount, of a resilient supporting member for engaging a horizontally disposed electrode at a point spaced from said mount, and means associated with said supporting member to engage an electrode extension substituted for an electrode in said mount, said extension carrying an electrode for auxiliary support by said last named means.

10. In an arc lamp, the combination with an electrode mount, of a resilient supporting member for engaging a horizontally disposed electrode at a point spaced from said mount, and means adjustably associated with said supporting member to engage an. electrode extension substituted for an, electrode in said mount, said extension carrying an electrode for auxiliary support by said last named means.

11. In an arc lamp, the combination with an electrode mount, of a resilient supporting member for engaging a horizontally disposed electrode at a point spaced from said mount, and means adjustably associated with said supporting member, said last named means having a lug with an arcuate extremity to engage an electrode extension substituted for an electrode in said mount, said extension carrying an electrode for auxiliary support by said last named means.

12. In an arc lamp, the combination with an electrode mount, of a resilient supporting member for engaging a horizontally disposed electrode at a point spaced from said mount, and means associated with said supporting member,

said last named meansl having a pivotally oonnected portion to engage an electrode extension substituted for an electrode in said mount, said extension carrying an electrode for auxiliary support by said last named means.

13. In an. arc lamp, the combination with an electrode mount, of a resilient supporting member for engaging a horizontally disposed electrode at a point spaced from said mount, means associated with said supporting member, said last named means having a pivotally connected portion, and an arcuate extremity on said pivotally connected portion to engage an electrode extension substituted for an electrode in said mount, said extension carrying an electrode for auxiliary support by said last named means.

electrode carried by said rod1ike member, and an auxiliary rest associated with said arcuate member to cooperate with an electrode carried by said rod-like member.

FRANK DESORMEAUX. 

